320123223612656 has 80 divisors (see below), whose sum is σ = 657876813912288. Its totient is φ = 150381746380800.

The previous prime is 320123223612649. The next prime is 320123223612659. The reversal of 320123223612656 is 656216322321023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320123223612659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746461811 + ... + 746890541.

Almost surely, 2^{320123223612656} is an apocalyptic number.

It is an amenable number.

320123223612656 is an abundant number, since it is smaller than the sum of its proper divisors (337753590299632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320123223612656 is a wasteful number, since it uses less digits than its factorization.

320123223612656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433570 (or 433564 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

Adding to 320123223612656 its reverse (656216322321023), we get a palindrome (976339545933679).

The spelling of 320123223612656 in words is "three hundred twenty trillion, one hundred twenty-three billion, two hundred twenty-three million, six hundred twelve thousand, six hundred fifty-six".